Поставити дієслова в дужках у Present Perfect Continuous.
1. They ….( to play) volleyball for an hour.
2. He …. (to go ) in for swimming for six years.
3. We …. ( to study) since 11 o`clock.
4. The boy …. ( to play) football since 10 a. m.
5. Athletes …. To compete) with their opponents for two days.